dmenu

dynamic menu
git clone git://git.suckless.org/dmenu
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dmenu.c (19333B)


      1 /* See LICENSE file for copyright and license details. */
      2 #include <ctype.h>
      3 #include <locale.h>
      4 #include <stdio.h>
      5 #include <stdlib.h>
      6 #include <string.h>
      7 #include <strings.h>
      8 #include <time.h>
      9 #include <unistd.h>
     10 
     11 #include <X11/Xlib.h>
     12 #include <X11/Xatom.h>
     13 #include <X11/Xutil.h>
     14 #ifdef XINERAMA
     15 #include <X11/extensions/Xinerama.h>
     16 #endif
     17 #include <X11/Xft/Xft.h>
     18 
     19 #include "drw.h"
     20 #include "util.h"
     21 
     22 /* macros */
     23 #define INTERSECT(x,y,w,h,r)  (MAX(0, MIN((x)+(w),(r).x_org+(r).width)  - MAX((x),(r).x_org)) \
     24                              * MAX(0, MIN((y)+(h),(r).y_org+(r).height) - MAX((y),(r).y_org)))
     25 #define LENGTH(X)             (sizeof X / sizeof X[0])
     26 #define TEXTW(X)              (drw_fontset_getwidth(drw, (X)) + lrpad)
     27 
     28 /* enums */
     29 enum { SchemeNorm, SchemeSel, SchemeOut, SchemeLast }; /* color schemes */
     30 
     31 struct item {
     32 	char *text;
     33 	struct item *left, *right;
     34 	int out;
     35 };
     36 
     37 static char text[BUFSIZ] = "";
     38 static char *embed;
     39 static int bh, mw, mh;
     40 static int inputw = 0, promptw;
     41 static int lrpad; /* sum of left and right padding */
     42 static size_t cursor;
     43 static struct item *items = NULL;
     44 static struct item *matches, *matchend;
     45 static struct item *prev, *curr, *next, *sel;
     46 static int mon = -1, screen;
     47 
     48 static Atom clip, utf8;
     49 static Display *dpy;
     50 static Window root, parentwin, win;
     51 static XIC xic;
     52 
     53 static Drw *drw;
     54 static Clr *scheme[SchemeLast];
     55 
     56 #include "config.h"
     57 
     58 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
     59 static char *(*fstrstr)(const char *, const char *) = strstr;
     60 
     61 static unsigned int
     62 textw_clamp(const char *str, unsigned int n)
     63 {
     64 	unsigned int w = drw_fontset_getwidth_clamp(drw, str, n) + lrpad;
     65 	return MIN(w, n);
     66 }
     67 
     68 static void
     69 appenditem(struct item *item, struct item **list, struct item **last)
     70 {
     71 	if (*last)
     72 		(*last)->right = item;
     73 	else
     74 		*list = item;
     75 
     76 	item->left = *last;
     77 	item->right = NULL;
     78 	*last = item;
     79 }
     80 
     81 static void
     82 calcoffsets(void)
     83 {
     84 	int i, n;
     85 
     86 	if (lines > 0)
     87 		n = lines * bh;
     88 	else
     89 		n = mw - (promptw + inputw + TEXTW("<") + TEXTW(">"));
     90 	/* calculate which items will begin the next page and previous page */
     91 	for (i = 0, next = curr; next; next = next->right)
     92 		if ((i += (lines > 0) ? bh : textw_clamp(next->text, n)) > n)
     93 			break;
     94 	for (i = 0, prev = curr; prev && prev->left; prev = prev->left)
     95 		if ((i += (lines > 0) ? bh : textw_clamp(prev->left->text, n)) > n)
     96 			break;
     97 }
     98 
     99 static void
    100 cleanup(void)
    101 {
    102 	size_t i;
    103 
    104 	XUngrabKey(dpy, AnyKey, AnyModifier, root);
    105 	for (i = 0; i < SchemeLast; i++)
    106 		free(scheme[i]);
    107 	for (i = 0; items && items[i].text; ++i)
    108 		free(items[i].text);
    109 	free(items);
    110 	drw_free(drw);
    111 	XSync(dpy, False);
    112 	XCloseDisplay(dpy);
    113 }
    114 
    115 static char *
    116 cistrstr(const char *h, const char *n)
    117 {
    118 	size_t i;
    119 
    120 	if (!n[0])
    121 		return (char *)h;
    122 
    123 	for (; *h; ++h) {
    124 		for (i = 0; n[i] && tolower((unsigned char)n[i]) ==
    125 		            tolower((unsigned char)h[i]); ++i)
    126 			;
    127 		if (n[i] == '\0')
    128 			return (char *)h;
    129 	}
    130 	return NULL;
    131 }
    132 
    133 static int
    134 drawitem(struct item *item, int x, int y, int w)
    135 {
    136 	if (item == sel)
    137 		drw_setscheme(drw, scheme[SchemeSel]);
    138 	else if (item->out)
    139 		drw_setscheme(drw, scheme[SchemeOut]);
    140 	else
    141 		drw_setscheme(drw, scheme[SchemeNorm]);
    142 
    143 	return drw_text(drw, x, y, w, bh, lrpad / 2, item->text, 0);
    144 }
    145 
    146 static void
    147 drawmenu(void)
    148 {
    149 	unsigned int curpos;
    150 	struct item *item;
    151 	int x = 0, y = 0, w;
    152 
    153 	drw_setscheme(drw, scheme[SchemeNorm]);
    154 	drw_rect(drw, 0, 0, mw, mh, 1, 1);
    155 
    156 	if (prompt && *prompt) {
    157 		drw_setscheme(drw, scheme[SchemeSel]);
    158 		x = drw_text(drw, x, 0, promptw, bh, lrpad / 2, prompt, 0);
    159 	}
    160 	/* draw input field */
    161 	w = (lines > 0 || !matches) ? mw - x : inputw;
    162 	drw_setscheme(drw, scheme[SchemeNorm]);
    163 	drw_text(drw, x, 0, w, bh, lrpad / 2, text, 0);
    164 
    165 	curpos = TEXTW(text) - TEXTW(&text[cursor]);
    166 	if ((curpos += lrpad / 2 - 1) < w) {
    167 		drw_setscheme(drw, scheme[SchemeNorm]);
    168 		drw_rect(drw, x + curpos, 2, 2, bh - 4, 1, 0);
    169 	}
    170 
    171 	if (lines > 0) {
    172 		/* draw vertical list */
    173 		for (item = curr; item != next; item = item->right)
    174 			drawitem(item, x, y += bh, mw - x);
    175 	} else if (matches) {
    176 		/* draw horizontal list */
    177 		x += inputw;
    178 		w = TEXTW("<");
    179 		if (curr->left) {
    180 			drw_setscheme(drw, scheme[SchemeNorm]);
    181 			drw_text(drw, x, 0, w, bh, lrpad / 2, "<", 0);
    182 		}
    183 		x += w;
    184 		for (item = curr; item != next; item = item->right)
    185 			x = drawitem(item, x, 0, textw_clamp(item->text, mw - x - TEXTW(">")));
    186 		if (next) {
    187 			w = TEXTW(">");
    188 			drw_setscheme(drw, scheme[SchemeNorm]);
    189 			drw_text(drw, mw - w, 0, w, bh, lrpad / 2, ">", 0);
    190 		}
    191 	}
    192 	drw_map(drw, win, 0, 0, mw, mh);
    193 }
    194 
    195 static void
    196 grabfocus(void)
    197 {
    198 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000  };
    199 	Window focuswin;
    200 	int i, revertwin;
    201 
    202 	for (i = 0; i < 100; ++i) {
    203 		XGetInputFocus(dpy, &focuswin, &revertwin);
    204 		if (focuswin == win)
    205 			return;
    206 		XSetInputFocus(dpy, win, RevertToParent, CurrentTime);
    207 		nanosleep(&ts, NULL);
    208 	}
    209 	die("cannot grab focus");
    210 }
    211 
    212 static void
    213 grabkeyboard(void)
    214 {
    215 	struct timespec ts = { .tv_sec = 0, .tv_nsec = 1000000  };
    216 	int i;
    217 
    218 	if (embed)
    219 		return;
    220 	/* try to grab keyboard, we may have to wait for another process to ungrab */
    221 	for (i = 0; i < 1000; i++) {
    222 		if (XGrabKeyboard(dpy, DefaultRootWindow(dpy), True, GrabModeAsync,
    223 		                  GrabModeAsync, CurrentTime) == GrabSuccess)
    224 			return;
    225 		nanosleep(&ts, NULL);
    226 	}
    227 	die("cannot grab keyboard");
    228 }
    229 
    230 static void
    231 match(void)
    232 {
    233 	static char **tokv = NULL;
    234 	static int tokn = 0;
    235 
    236 	char buf[sizeof text], *s;
    237 	int i, tokc = 0;
    238 	size_t len, textsize;
    239 	struct item *item, *lprefix, *lsubstr, *prefixend, *substrend;
    240 
    241 	strcpy(buf, text);
    242 	/* separate input text into tokens to be matched individually */
    243 	for (s = strtok(buf, " "); s; tokv[tokc - 1] = s, s = strtok(NULL, " "))
    244 		if (++tokc > tokn && !(tokv = realloc(tokv, ++tokn * sizeof *tokv)))
    245 			die("cannot realloc %zu bytes:", tokn * sizeof *tokv);
    246 	len = tokc ? strlen(tokv[0]) : 0;
    247 
    248 	matches = lprefix = lsubstr = matchend = prefixend = substrend = NULL;
    249 	textsize = strlen(text) + 1;
    250 	for (item = items; item && item->text; item++) {
    251 		for (i = 0; i < tokc; i++)
    252 			if (!fstrstr(item->text, tokv[i]))
    253 				break;
    254 		if (i != tokc) /* not all tokens match */
    255 			continue;
    256 		/* exact matches go first, then prefixes, then substrings */
    257 		if (!tokc || !fstrncmp(text, item->text, textsize))
    258 			appenditem(item, &matches, &matchend);
    259 		else if (!fstrncmp(tokv[0], item->text, len))
    260 			appenditem(item, &lprefix, &prefixend);
    261 		else
    262 			appenditem(item, &lsubstr, &substrend);
    263 	}
    264 	if (lprefix) {
    265 		if (matches) {
    266 			matchend->right = lprefix;
    267 			lprefix->left = matchend;
    268 		} else
    269 			matches = lprefix;
    270 		matchend = prefixend;
    271 	}
    272 	if (lsubstr) {
    273 		if (matches) {
    274 			matchend->right = lsubstr;
    275 			lsubstr->left = matchend;
    276 		} else
    277 			matches = lsubstr;
    278 		matchend = substrend;
    279 	}
    280 	curr = sel = matches;
    281 	calcoffsets();
    282 }
    283 
    284 static void
    285 insert(const char *str, ssize_t n)
    286 {
    287 	if (strlen(text) + n > sizeof text - 1)
    288 		return;
    289 	/* move existing text out of the way, insert new text, and update cursor */
    290 	memmove(&text[cursor + n], &text[cursor], sizeof text - cursor - MAX(n, 0));
    291 	if (n > 0)
    292 		memcpy(&text[cursor], str, n);
    293 	cursor += n;
    294 	match();
    295 }
    296 
    297 static size_t
    298 nextrune(int inc)
    299 {
    300 	ssize_t n;
    301 
    302 	/* return location of next utf8 rune in the given direction (+1 or -1) */
    303 	for (n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc)
    304 		;
    305 	return n;
    306 }
    307 
    308 static void
    309 movewordedge(int dir)
    310 {
    311 	if (dir < 0) { /* move cursor to the start of the word*/
    312 		while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
    313 			cursor = nextrune(-1);
    314 		while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
    315 			cursor = nextrune(-1);
    316 	} else { /* move cursor to the end of the word */
    317 		while (text[cursor] && strchr(worddelimiters, text[cursor]))
    318 			cursor = nextrune(+1);
    319 		while (text[cursor] && !strchr(worddelimiters, text[cursor]))
    320 			cursor = nextrune(+1);
    321 	}
    322 }
    323 
    324 static void
    325 keypress(XKeyEvent *ev)
    326 {
    327 	char buf[32];
    328 	int len;
    329 	KeySym ksym;
    330 	Status status;
    331 
    332 	len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
    333 	switch (status) {
    334 	default: /* XLookupNone, XBufferOverflow */
    335 		return;
    336 	case XLookupChars:
    337 		goto insert;
    338 	case XLookupKeySym:
    339 	case XLookupBoth:
    340 		break;
    341 	}
    342 
    343 	if (ev->state & ControlMask) {
    344 		switch(ksym) {
    345 		case XK_a: ksym = XK_Home;      break;
    346 		case XK_b: ksym = XK_Left;      break;
    347 		case XK_c: ksym = XK_Escape;    break;
    348 		case XK_d: ksym = XK_Delete;    break;
    349 		case XK_e: ksym = XK_End;       break;
    350 		case XK_f: ksym = XK_Right;     break;
    351 		case XK_g: ksym = XK_Escape;    break;
    352 		case XK_h: ksym = XK_BackSpace; break;
    353 		case XK_i: ksym = XK_Tab;       break;
    354 		case XK_j: /* fallthrough */
    355 		case XK_J: /* fallthrough */
    356 		case XK_m: /* fallthrough */
    357 		case XK_M: ksym = XK_Return; ev->state &= ~ControlMask; break;
    358 		case XK_n: ksym = XK_Down;      break;
    359 		case XK_p: ksym = XK_Up;        break;
    360 
    361 		case XK_k: /* delete right */
    362 			text[cursor] = '\0';
    363 			match();
    364 			break;
    365 		case XK_u: /* delete left */
    366 			insert(NULL, 0 - cursor);
    367 			break;
    368 		case XK_w: /* delete word */
    369 			while (cursor > 0 && strchr(worddelimiters, text[nextrune(-1)]))
    370 				insert(NULL, nextrune(-1) - cursor);
    371 			while (cursor > 0 && !strchr(worddelimiters, text[nextrune(-1)]))
    372 				insert(NULL, nextrune(-1) - cursor);
    373 			break;
    374 		case XK_y: /* paste selection */
    375 		case XK_Y:
    376 			XConvertSelection(dpy, (ev->state & ShiftMask) ? clip : XA_PRIMARY,
    377 			                  utf8, utf8, win, CurrentTime);
    378 			return;
    379 		case XK_Left:
    380 		case XK_KP_Left:
    381 			movewordedge(-1);
    382 			goto draw;
    383 		case XK_Right:
    384 		case XK_KP_Right:
    385 			movewordedge(+1);
    386 			goto draw;
    387 		case XK_Return:
    388 		case XK_KP_Enter:
    389 			break;
    390 		case XK_bracketleft:
    391 			cleanup();
    392 			exit(1);
    393 		default:
    394 			return;
    395 		}
    396 	} else if (ev->state & Mod1Mask) {
    397 		switch(ksym) {
    398 		case XK_b:
    399 			movewordedge(-1);
    400 			goto draw;
    401 		case XK_f:
    402 			movewordedge(+1);
    403 			goto draw;
    404 		case XK_g: ksym = XK_Home;  break;
    405 		case XK_G: ksym = XK_End;   break;
    406 		case XK_h: ksym = XK_Up;    break;
    407 		case XK_j: ksym = XK_Next;  break;
    408 		case XK_k: ksym = XK_Prior; break;
    409 		case XK_l: ksym = XK_Down;  break;
    410 		default:
    411 			return;
    412 		}
    413 	}
    414 
    415 	switch(ksym) {
    416 	default:
    417 insert:
    418 		if (!iscntrl((unsigned char)*buf))
    419 			insert(buf, len);
    420 		break;
    421 	case XK_Delete:
    422 	case XK_KP_Delete:
    423 		if (text[cursor] == '\0')
    424 			return;
    425 		cursor = nextrune(+1);
    426 		/* fallthrough */
    427 	case XK_BackSpace:
    428 		if (cursor == 0)
    429 			return;
    430 		insert(NULL, nextrune(-1) - cursor);
    431 		break;
    432 	case XK_End:
    433 	case XK_KP_End:
    434 		if (text[cursor] != '\0') {
    435 			cursor = strlen(text);
    436 			break;
    437 		}
    438 		if (next) {
    439 			/* jump to end of list and position items in reverse */
    440 			curr = matchend;
    441 			calcoffsets();
    442 			curr = prev;
    443 			calcoffsets();
    444 			while (next && (curr = curr->right))
    445 				calcoffsets();
    446 		}
    447 		sel = matchend;
    448 		break;
    449 	case XK_Escape:
    450 		cleanup();
    451 		exit(1);
    452 	case XK_Home:
    453 	case XK_KP_Home:
    454 		if (sel == matches) {
    455 			cursor = 0;
    456 			break;
    457 		}
    458 		sel = curr = matches;
    459 		calcoffsets();
    460 		break;
    461 	case XK_Left:
    462 	case XK_KP_Left:
    463 		if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
    464 			cursor = nextrune(-1);
    465 			break;
    466 		}
    467 		if (lines > 0)
    468 			return;
    469 		/* fallthrough */
    470 	case XK_Up:
    471 	case XK_KP_Up:
    472 		if (sel && sel->left && (sel = sel->left)->right == curr) {
    473 			curr = prev;
    474 			calcoffsets();
    475 		}
    476 		break;
    477 	case XK_Next:
    478 	case XK_KP_Next:
    479 		if (!next)
    480 			return;
    481 		sel = curr = next;
    482 		calcoffsets();
    483 		break;
    484 	case XK_Prior:
    485 	case XK_KP_Prior:
    486 		if (!prev)
    487 			return;
    488 		sel = curr = prev;
    489 		calcoffsets();
    490 		break;
    491 	case XK_Return:
    492 	case XK_KP_Enter:
    493 		puts((sel && !(ev->state & ShiftMask)) ? sel->text : text);
    494 		if (!(ev->state & ControlMask)) {
    495 			cleanup();
    496 			exit(0);
    497 		}
    498 		if (sel)
    499 			sel->out = 1;
    500 		break;
    501 	case XK_Right:
    502 	case XK_KP_Right:
    503 		if (text[cursor] != '\0') {
    504 			cursor = nextrune(+1);
    505 			break;
    506 		}
    507 		if (lines > 0)
    508 			return;
    509 		/* fallthrough */
    510 	case XK_Down:
    511 	case XK_KP_Down:
    512 		if (sel && sel->right && (sel = sel->right) == next) {
    513 			curr = next;
    514 			calcoffsets();
    515 		}
    516 		break;
    517 	case XK_Tab:
    518 		if (!sel)
    519 			return;
    520 		cursor = strnlen(sel->text, sizeof text - 1);
    521 		memcpy(text, sel->text, cursor);
    522 		text[cursor] = '\0';
    523 		match();
    524 		break;
    525 	}
    526 
    527 draw:
    528 	drawmenu();
    529 }
    530 
    531 static void
    532 paste(void)
    533 {
    534 	char *p, *q;
    535 	int di;
    536 	unsigned long dl;
    537 	Atom da;
    538 
    539 	/* we have been given the current selection, now insert it into input */
    540 	if (XGetWindowProperty(dpy, win, utf8, 0, (sizeof text / 4) + 1, False,
    541 	                   utf8, &da, &di, &dl, &dl, (unsigned char **)&p)
    542 	    == Success && p) {
    543 		insert(p, (q = strchr(p, '\n')) ? q - p : (ssize_t)strlen(p));
    544 		XFree(p);
    545 	}
    546 	drawmenu();
    547 }
    548 
    549 static void
    550 readstdin(void)
    551 {
    552 	char *line = NULL;
    553 	size_t i, junk, size = 0;
    554 	ssize_t len;
    555 
    556 	/* read each line from stdin and add it to the item list */
    557 	for (i = 0; (len = getline(&line, &junk, stdin)) != -1; i++, line = NULL) {
    558 		if (i + 1 >= size / sizeof *items)
    559 			if (!(items = realloc(items, (size += BUFSIZ))))
    560 				die("cannot realloc %zu bytes:", size);
    561 		if (line[len - 1] == '\n')
    562 			line[len - 1] = '\0';
    563 		items[i].text = line;
    564 		items[i].out = 0;
    565 	}
    566 	if (items)
    567 		items[i].text = NULL;
    568 	lines = MIN(lines, i);
    569 }
    570 
    571 static void
    572 run(void)
    573 {
    574 	XEvent ev;
    575 
    576 	while (!XNextEvent(dpy, &ev)) {
    577 		if (XFilterEvent(&ev, win))
    578 			continue;
    579 		switch(ev.type) {
    580 		case DestroyNotify:
    581 			if (ev.xdestroywindow.window != win)
    582 				break;
    583 			cleanup();
    584 			exit(1);
    585 		case Expose:
    586 			if (ev.xexpose.count == 0)
    587 				drw_map(drw, win, 0, 0, mw, mh);
    588 			break;
    589 		case FocusIn:
    590 			/* regrab focus from parent window */
    591 			if (ev.xfocus.window != win)
    592 				grabfocus();
    593 			break;
    594 		case KeyPress:
    595 			keypress(&ev.xkey);
    596 			break;
    597 		case SelectionNotify:
    598 			if (ev.xselection.property == utf8)
    599 				paste();
    600 			break;
    601 		case VisibilityNotify:
    602 			if (ev.xvisibility.state != VisibilityUnobscured)
    603 				XRaiseWindow(dpy, win);
    604 			break;
    605 		}
    606 	}
    607 }
    608 
    609 static void
    610 setup(void)
    611 {
    612 	int x, y, i, j;
    613 	unsigned int du;
    614 	XSetWindowAttributes swa;
    615 	XIM xim;
    616 	Window w, dw, *dws;
    617 	XWindowAttributes wa;
    618 	XClassHint ch = {"dmenu", "dmenu"};
    619 #ifdef XINERAMA
    620 	XineramaScreenInfo *info;
    621 	Window pw;
    622 	int a, di, n, area = 0;
    623 #endif
    624 	/* init appearance */
    625 	for (j = 0; j < SchemeLast; j++)
    626 		scheme[j] = drw_scm_create(drw, colors[j], 2);
    627 
    628 	clip = XInternAtom(dpy, "CLIPBOARD",   False);
    629 	utf8 = XInternAtom(dpy, "UTF8_STRING", False);
    630 
    631 	/* calculate menu geometry */
    632 	bh = drw->fonts->h + 2;
    633 	lines = MAX(lines, 0);
    634 	mh = (lines + 1) * bh;
    635 #ifdef XINERAMA
    636 	i = 0;
    637 	if (parentwin == root && (info = XineramaQueryScreens(dpy, &n))) {
    638 		XGetInputFocus(dpy, &w, &di);
    639 		if (mon >= 0 && mon < n)
    640 			i = mon;
    641 		else if (w != root && w != PointerRoot && w != None) {
    642 			/* find top-level window containing current input focus */
    643 			do {
    644 				if (XQueryTree(dpy, (pw = w), &dw, &w, &dws, &du) && dws)
    645 					XFree(dws);
    646 			} while (w != root && w != pw);
    647 			/* find xinerama screen with which the window intersects most */
    648 			if (XGetWindowAttributes(dpy, pw, &wa))
    649 				for (j = 0; j < n; j++)
    650 					if ((a = INTERSECT(wa.x, wa.y, wa.width, wa.height, info[j])) > area) {
    651 						area = a;
    652 						i = j;
    653 					}
    654 		}
    655 		/* no focused window is on screen, so use pointer location instead */
    656 		if (mon < 0 && !area && XQueryPointer(dpy, root, &dw, &dw, &x, &y, &di, &di, &du))
    657 			for (i = 0; i < n; i++)
    658 				if (INTERSECT(x, y, 1, 1, info[i]) != 0)
    659 					break;
    660 
    661 		x = info[i].x_org;
    662 		y = info[i].y_org + (topbar ? 0 : info[i].height - mh);
    663 		mw = info[i].width;
    664 		XFree(info);
    665 	} else
    666 #endif
    667 	{
    668 		if (!XGetWindowAttributes(dpy, parentwin, &wa))
    669 			die("could not get embedding window attributes: 0x%lx",
    670 			    parentwin);
    671 		x = 0;
    672 		y = topbar ? 0 : wa.height - mh;
    673 		mw = wa.width;
    674 	}
    675 	promptw = (prompt && *prompt) ? TEXTW(prompt) - lrpad / 4 : 0;
    676 	inputw = mw / 3; /* input width: ~33% of monitor width */
    677 	match();
    678 
    679 	/* create menu window */
    680 	swa.override_redirect = True;
    681 	swa.background_pixel = scheme[SchemeNorm][ColBg].pixel;
    682 	swa.event_mask = ExposureMask | KeyPressMask | VisibilityChangeMask;
    683 	win = XCreateWindow(dpy, parentwin, x, y, mw, mh, 0,
    684 	                    CopyFromParent, CopyFromParent, CopyFromParent,
    685 	                    CWOverrideRedirect | CWBackPixel | CWEventMask, &swa);
    686 	XSetClassHint(dpy, win, &ch);
    687 
    688 
    689 	/* input methods */
    690 	if ((xim = XOpenIM(dpy, NULL, NULL, NULL)) == NULL)
    691 		die("XOpenIM failed: could not open input device");
    692 
    693 	xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
    694 	                XNClientWindow, win, XNFocusWindow, win, NULL);
    695 
    696 	XMapRaised(dpy, win);
    697 	if (embed) {
    698 		XSelectInput(dpy, parentwin, FocusChangeMask | SubstructureNotifyMask);
    699 		if (XQueryTree(dpy, parentwin, &dw, &w, &dws, &du) && dws) {
    700 			for (i = 0; i < du && dws[i] != win; ++i)
    701 				XSelectInput(dpy, dws[i], FocusChangeMask);
    702 			XFree(dws);
    703 		}
    704 		grabfocus();
    705 	}
    706 	drw_resize(drw, mw, mh);
    707 	drawmenu();
    708 }
    709 
    710 static void
    711 usage(void)
    712 {
    713 	fputs("usage: dmenu [-bfiv] [-l lines] [-p prompt] [-fn font] [-m monitor]\n"
    714 	      "             [-nb color] [-nf color] [-sb color] [-sf color] [-w windowid]\n", stderr);
    715 	exit(1);
    716 }
    717 
    718 int
    719 main(int argc, char *argv[])
    720 {
    721 	XWindowAttributes wa;
    722 	int i, fast = 0;
    723 
    724 	for (i = 1; i < argc; i++)
    725 		/* these options take no arguments */
    726 		if (!strcmp(argv[i], "-v")) {      /* prints version information */
    727 			puts("dmenu-"VERSION);
    728 			exit(0);
    729 		} else if (!strcmp(argv[i], "-b")) /* appears at the bottom of the screen */
    730 			topbar = 0;
    731 		else if (!strcmp(argv[i], "-f"))   /* grabs keyboard before reading stdin */
    732 			fast = 1;
    733 		else if (!strcmp(argv[i], "-i")) { /* case-insensitive item matching */
    734 			fstrncmp = strncasecmp;
    735 			fstrstr = cistrstr;
    736 		} else if (i + 1 == argc)
    737 			usage();
    738 		/* these options take one argument */
    739 		else if (!strcmp(argv[i], "-l"))   /* number of lines in vertical list */
    740 			lines = atoi(argv[++i]);
    741 		else if (!strcmp(argv[i], "-m"))
    742 			mon = atoi(argv[++i]);
    743 		else if (!strcmp(argv[i], "-p"))   /* adds prompt to left of input field */
    744 			prompt = argv[++i];
    745 		else if (!strcmp(argv[i], "-fn"))  /* font or font set */
    746 			fonts[0] = argv[++i];
    747 		else if (!strcmp(argv[i], "-nb"))  /* normal background color */
    748 			colors[SchemeNorm][ColBg] = argv[++i];
    749 		else if (!strcmp(argv[i], "-nf"))  /* normal foreground color */
    750 			colors[SchemeNorm][ColFg] = argv[++i];
    751 		else if (!strcmp(argv[i], "-sb"))  /* selected background color */
    752 			colors[SchemeSel][ColBg] = argv[++i];
    753 		else if (!strcmp(argv[i], "-sf"))  /* selected foreground color */
    754 			colors[SchemeSel][ColFg] = argv[++i];
    755 		else if (!strcmp(argv[i], "-w"))   /* embedding window id */
    756 			embed = argv[++i];
    757 		else
    758 			usage();
    759 
    760 	if (!setlocale(LC_CTYPE, "") || !XSupportsLocale())
    761 		fputs("warning: no locale support\n", stderr);
    762 	if (!(dpy = XOpenDisplay(NULL)))
    763 		die("cannot open display");
    764 	screen = DefaultScreen(dpy);
    765 	root = RootWindow(dpy, screen);
    766 	if (!embed || !(parentwin = strtol(embed, NULL, 0)))
    767 		parentwin = root;
    768 	if (!XGetWindowAttributes(dpy, parentwin, &wa))
    769 		die("could not get embedding window attributes: 0x%lx",
    770 		    parentwin);
    771 	drw = drw_create(dpy, screen, root, wa.width, wa.height);
    772 	if (!drw_fontset_create(drw, fonts, LENGTH(fonts)))
    773 		die("no fonts could be loaded.");
    774 	lrpad = drw->fonts->h;
    775 
    776 #ifdef __OpenBSD__
    777 	if (pledge("stdio rpath", NULL) == -1)
    778 		die("pledge");
    779 #endif
    780 
    781 	if (fast && !isatty(0)) {
    782 		grabkeyboard();
    783 		readstdin();
    784 	} else {
    785 		readstdin();
    786 		grabkeyboard();
    787 	}
    788 	setup();
    789 	run();
    790 
    791 	return 1; /* unreachable */
    792 }